More Plugins and Enhancements

Started implementing post-format plugins to allow things like validation through the use of HTML tidy and xsltproc. However, progress on the feed validator has been slow and I've been tempted to rewrite the default templates so that they're easier to parse. Added a new option, --template, for the makepage option and improved it's default template. Also made it possible to apply the title attribute to the title of a new page created through the makepage option.